To determine the mass of 3.24 atoms of iron, we need to know the atomic mass of iron. The atomic mass of iron is approximately 55.845 atomic mass units (AMU).
To calculate the mass, we multiply the number of atoms by the atomic mass:
Mass = Number of atoms × Atomic mass
Mass = 3.24 atoms × 55.845 AMU
Mass ≈ 181.0026 AMU
Therefore, the mass of 3.24 atoms of iron is approximately 181.0026 atomic mass units (AMU).